US20120018069A1 - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- US20120018069A1 US20120018069A1 US13/183,350 US201113183350A US2012018069A1 US 20120018069 A1 US20120018069 A1 US 20120018069A1 US 201113183350 A US201113183350 A US 201113183350A US 2012018069 A1 US2012018069 A1 US 2012018069A1
- Authority
- US
- United States
- Prior art keywords
- sipes
- protrusions
- sipe wall
- blocks
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims 13
- 230000002708 enhancing effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C11/1218—Three-dimensional shape with regard to depth and extending direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
Definitions
- the present technology relates to a pneumatic tire and particularly relates to a pneumatic tire having enhanced tire braking performance on ice.
- Tread patterns in which a plurality of sipes is disposed in a tire pattern in order to enhance braking performance on ice of studless tires are known. Also, in recent years, there has been a tendency toward increasing the number of sipes. However, sipe density is increased as a result of increasing the number of sipes, and while this leads to an increase in the number of edges, it also leads to the problems of the overall rigidity of the block declining and braking performance on ice declining.
- a plurality of blocks are provided in a tread portion by a plurality of vertical grooves extending in the tire circumferential direction and a lateral groove extending in a direction that intersects the tire circumferential direction
- a plurality of sipes spaced in the tire circumferential direction are provided in a tread surface of the blocks, at an area located at edges of the blocks in the tire circumferential direction, a portion of the blocks is partitioned by the sipes and the lateral groove, and at areas other than the edges in the tire circumferential direction, a portion of the blocks is partitioned by adjacent sipes.
- the portion of the blocks located at the edges in the tire circumferential direction is partitioned by the sipes and a lateral groove having a width greater than that of the sipes, and, compared to portions of blocks located at other areas that are sandwiched by adjacent sipes, these portions only engage with a portion of an adjacent block on one side and, thus, are prone to collapsing.
- the present technology was devised in light of the problems described above and provides a pneumatic tire that is useful in suppressing collapsing of portions of blocks positioned at edges in the tire circumferential direction and enhancing braking performance on ice.
- the present technology is a pneumatic tire including, in a tread portion, a plurality of blocks partitioned by a plurality of vertical grooves extending in a tire circumferential direction and a lateral groove extending in a direction that intersects with the tire circumferential direction.
- the pneumatic tire also includes, in a tread surface of the blocks, a plurality of sipes spaced in the tire circumferential direction extending in the direction that intersects with the tire circumferential direction. Portions of the blocks partitioned by the lateral groove and the sipes are formed at areas of the blocks located at edges in the tire circumferential direction, and portions of the blocks partitioned by sipes adjacent in the tire circumferential direction are formed in other areas of the blocks.
- protrusions are formed on a first sipe wall surface of mutually opposing sipe wall surfaces, and recesses that can engage with the protrusions are formed in a second sipe wall surface.
- the protrusions and the recesses are formed so as to generate a force by engaging that works to suppress bending deformation in the tire circumferential direction of the portions of the blocks.
- the protrusions and the recesses are formed so that the engaging between the portions of the blocks located at the edges in the tire circumferential direction and the portions of the blocks positioned adjacent to said portions of the blocks generates a force that works to suppress the bending deformation that is greater than the force generated by engaging between the other portions of the blocks.
- the portions of the blocks located at the edges in the tire circumferential direction are partitioned by sipes and a lateral groove having a width greater than that of the sipes, and the protrusions and the recesses engage only on one side. Therefore, these portions are more prone to collapsing than the portions of the blocks located at other areas that are partitioned by adjacent sipes.
- the engaging at the portions of the blocks located at the edges in the tire circumferential direction and the portions of the blocks positioned adjacent to said portions of the blocks generates a force that works to suppress bending deformation and that is configured so as to be greater than a force generated by engaging at the other portions of the blocks.
- firm engaging is obtained and the collapsing of the portions of the blocks located at the edges in the tire circumferential direction is suppressed.
- FIG. 1A is a plan view of a block.
- FIG. 1B is a cross-sectional view of a portion of the block that is cut at a portion of the sipes and is also an explanatory view of the protrusions.
- FIGS. 2A and 2B are explanatory views of the sipes, the protrusions, and the recesses; and are also perspective views of cross-sections of the portions of the block.
- FIG. 3 is a table showing test results for dry braking, wet braking, and braking on ice.
- FIG. 4 is an explanatory view of the sipes, the protrusions, and the recesses; and is also a perspective view of a cross-section of the portions of the block.
- FIGS. 5A to 5C are explanatory diagrams of a proportion of a sipe wall surface occupied by a cross-sectional area of the protrusions, a proportion of the sipe wall surface occupied by a cross-sectional area of the protrusions and the recesses, or a proportion of the sipe wall surface occupied by a cross-sectional area of the recesses, with respect to an area of the sipe wall surface.
- FIG. 5A is a perspective view of a cross section of a portion of the block.
- FIG. 5B is a plan view of a sipe.
- FIG. 5C is a drawing illustrating the cross-sectional area of the protrusions and the recesses occupied on the sipe wall surface in a state where the sipe wall surface and the sipe are laid open.
- FIG. 6 is a table showing test results for dry braking, wet braking, and braking on ice.
- a plurality of blocks 16 is provided in a tread portion 10 by a plurality of vertical grooves 12 extending in a tire circumferential direction and lateral grooves 14 extending in a direction that intersects the tire circumferential direction.
- a plurality of sipes 18 spaced in the tire circumferential direction are provided in a tread surface 10 A of the blocks 16 , extending in the direction that intersects with the tire circumferential direction.
- Portions 16 A of the blocks 16 are partitioned (sandwiched) by the sipes 18 and a lateral groove 14 having a width that is greater than that of the sipes 18 at areas of the blocks 16 located at edges in the tire circumferential direction.
- portions 16 B of the blocks 16 are partitioned (sandwiched) by adjacent sipes 18 at areas of the blocks 16 other than at the edges in the tire circumferential direction.
- a width W of the sipes 18 is preferably 0.3 mm or greater but 1.5 mm or less.
- a shape in a longitudinal direction of the sipes 18 may be configured as desired and, for example, may extend in a zigzag shape.
- a depth of the sipes 18 may extend linearly in a direction perpendicular to the tread surface 10 , or alternately, as illustrated in FIG. 2B , may extend in a bent manner from the tread surface 10 .
- the sipes 18 have a uniform depth in the longitudinal direction thereof, with the exception of both ends. Both ends are configured so as to have a bottom-raising portion 1802 where a bottom surface is gradually raised.
- protrusions 22 are formed on a first sipe wall surface of mutually opposing sipe wall surfaces 1804 and recesses 24 that engage with the protrusions 22 are formed on a second sipe wall surface. Collapsing of the portions of the blocks 16 sandwiched by the sipes 18 is suppressed due to the engaging of the protrusions 22 and the recesses 24 . Specifically, due to the engaging of the protrusions 22 and the recesses 24 a configuration is obtained in which a force is generated that works to suppress bending deformation in the tire circumferential direction of the portions of the blocks 16 .
- a plurality of the protrusions 22 and the recesses 24 are provided spaced in the longitudinal direction of the sipes 18 and a depth direction of the sipes 18 .
- the protrusions 22 have a height in a direction perpendicular to the sipe wall surfaces 1804 .
- portions of the protrusions 22 protruding from the sipe wall surfaces 1804 may be provided with a cylindrical shape and ends thereof may be provided with a hemispherical shape. Alternately, an entirety of the protrusions 22 may be provided with a hemispherical shape. In short, it is sufficient that the protrusions 22 and the recesses 24 be provided with shapes that mutually engage when the portions 16 A of the block 16 collapse so as to suppress the collapsing of the portions 16 A of the block 16 .
- the protrusions 22 and the recesses 24 are configured so as to suppress collapsing in the tire circumferential direction of the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction more than the other portions 16 B of the blocks 16 .
- the protrusions 22 and the recesses 24 are formed so that the engaging between the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction and the portions 16 B of the blocks 16 positioned adjacent to said portions 16 A of the blocks 16 generates a force that works to suppress the bending deformation that is greater than the force generated by engaging between the other portions 16 B of the blocks 16 .
- a height H 1 of the protrusions 22 provided on the sipe wall surfaces 1804 of the sipes 18 located at the edges in the tire circumferential direction is greater than a height H 2 of the protrusions 22 provided on the sipe wall surfaces 1804 of the other sipes 18 .
- the height H 1 of the protrusions 22 provided on the sipe wall surfaces 1804 of the sipes 18 located at the edges in the tire circumferential direction is preferably not less than 1.2 times and not more than 3.0 times greater than the height H 2 of the protrusions 22 provided on the sipe wall surfaces 1804 of the other sipes 18 . More specifically, the height H 2 of the protrusions 22 provided on the sipe wall surfaces 1804 of the other sipes 18 is preferably from about 0.5 to 3.0 mm.
- the protrusions 22 and recesses 24 engage and collapsing of the portions 16 A of the block 16 is suppressed. Thereby, a decline in contact area is suppressed and deformation of the block 16 is suppressed, which are advantageous for enhancing braking performance on ice.
- the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction are partitioned by the sipes 18 and a lateral groove 14 having a width greater than that of the sipes 18 and engaging between the protrusions 22 and the recesses 24 only occurs on one side of the portions 16 A of the blocks 16 . Therefore, these portions 16 A are more prone to collapsing than the portions 16 B of the blocks 16 located at other areas partitioned by adjacent sipes 18 .
- the height H 1 of the protrusions 22 provided on the sipe wall surfaces 1804 of the sipes 18 located at the edges in the tire circumferential direction is greater than the height H 2 of the protrusions 22 provided on the sipe wall surfaces 1804 of the other sipes 18 .
- the protrusions 22 and the recesses 24 engage more firmly when the height H 1 of the protrusions 22 is great and, therefore, the force that works to suppress the bending deformation is great. While the protrusions 22 and the recesses 24 only engage on one side, collapsing of the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction is suppressed.
- collapsing of the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction is suppressed, a configuration in which the portions of the blocks collapse uniformly in the tire circumferential direction can be obtained, and edge effect can be enhanced, which is advantageous for enhancing braking performance on ice. Additionally, sipe peeling is reduced, which is advantageous for suppressing uneven wear.
- Radial studless tires having a tire size of 215/60R16 provided with protrusions 22 and recesses 24 that engage with these protrusions 22 having the configurations shown in FIGS. 1A and 3 were assembled on rims having a rim size of 16 ⁇ 7J.
- the tires were inflated to an inner pressure of 200 kPa and mounted on the four wheels of an RV vehicle having an engine displacement of 2,000 cc.
- Tests for a Conventional Example and Working Examples 1, 2, 3, and 4 were conducted for dry braking, wet braking, and braking on ice.
- the width W of the sipes 18 was 0.4 mm
- the depth D was 6 mm
- the length L was 10 mm.
- Dry braking was measured as a braking distance from a point of brake application to stop when traveling on a dry asphalt road surface at a speed of 100 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Wet braking was measured as a braking distance from a point of brake application to stop when traveling on a wet asphalt road surface at a speed of 60 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Braking on ice was measured as a braking distance from a point of brake application to stop when traveling on ice at a speed of 40 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- a plurality of sipes 18 extending in a direction that intersects with the tire circumferential direction and spaced in the tire circumferential direction are provided in a tread surface 10 A of blocks 16 partitioned by a plurality of vertical grooves 12 and lateral grooves 14 , and protrusions 22 and recesses 24 that mutually engage and suppress the collapsing of the portions of the blocks 16 are provided on mutually opposing sipe wall surfaces 1804 in the sipes 18 , the same as in the first embodiment.
- portions 16 A of the blocks 16 located at edges in the tire circumferential direction are partitioned by the sipes 18 and a lateral groove 14 having a width greater than that of the sipes 18 . Therefore, these portions 16 A are more prone to collapsing than portions 16 B of the blocks 16 located at other areas partitioned by adjacent sipes 18 , the same as in the first embodiment.
- the protrusions 22 and the recesses 24 are formed so that the engaging between the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction and the portions 16 B of the blocks 16 positioned adjacent to said portions 16 A of the blocks 16 generates a force that works to suppress the bending deformation that is greater than the force generated by engaging between the other portions 16 B of the blocks 16 .
- the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of the protrusions 22 , the proportion occupied by the cross-sectional area the protrusions 22 and the recesses 24 , or the proportion occupied by the cross-sectional area of the recesses 24 , with respect to an area of the sipe wall surfaces 1804 is not less than 1.2 times and not more than 3.0 times greater for the sipe wall surfaces 1804 of the sipes 18 located at the edges in the tire circumferential direction than for the sipe wall surfaces 1804 of the other sipes 18 .
- the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of the protrusions 22 , with respect to the area of the sipe wall surfaces 1804 is greater for the sipes 18 located at the edges in the tire circumferential direction than for the other sipes 18 .
- the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of the recesses 24 , with respect to the area of the sipe wall surfaces 1804 , is greater for the sipes 18 located at the edges in the tire circumferential direction than for the other sipes 18 .
- the protrusions 22 and the recesses 24 are both formed in the first side wall 1804 , and the protrusions 22 and the recesses 24 are both formed in the second side wall 1804 of the pair of opposing side walls 1804 and 1804 in the sipes 18 , from the perspective of the side walls 1804 , the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of the protrusions 22 and the recesses 24 with respect to the area of the sipe wall surfaces 1804 is formed greater for the sipes located at the edges in the tire circumferential direction than for the other sipes 18 .
- the height of the protrusions 22 is preferably from about 0.5 to 3.0 mm, the same as in the first embodiment.
- Examples of methods that can be considered for varying the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of protrusions and recesses (the protrusions 22 and the recesses 24 ) between the sipes 18 at the edges in the tire circumferential direction and the other sipes 18 include aspects of adjusting the number of the protrusions and recesses provided in the sipes 18 and varying the cross-sectional area of the protrusions and recesses.
- the number of protrusions and recesses provided in the sipes is adjusted. Specifically, as illustrated in FIG. 4 , in the sipes 18 located at the edges in the tire circumferential direction, three of the protrusions 22 are provided spaced in the depth direction on the first sipe wall surface 1804 of the opposing sipe wall surfaces 1804 and 1804 in the sipes 18 , and three of the recesses 24 that engage with the protrusions 22 are provided spaced in the depth direction on the second sipe wall surface 1804 .
- two of the protrusions 22 are provided spaced in the depth direction on the first sipe wall surface 1804 of the opposing sipe wall surfaces 1804 and 1804 in the sipes 18
- two of the recesses 24 that engage with the protrusions 22 are provided spaced in the depth direction on the second sipe wall surface 1804 .
- the protrusions 22 and the recesses 24 engage and collapsing of the portions 16 A of the block 16 is suppressed. Thereby, a decline in contact area is suppressed and deformation of the block 16 is suppressed, which are advantageous for enhancing braking performance on ice.
- the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction are partitioned by the sipes 18 and a lateral groove 14 having a width greater than that of the sipes 18 . Therefore, these portions 16 A are more prone to collapsing than the portions 16 B of the blocks 16 located at other areas partitioned by adjacent sipes 18 .
- a number of the protrusions 22 and the recesses 24 provided on the sipe wall surfaces 1804 of the sipes 18 located at the edges in the tire circumferential direction is greater than that of the protrusions 22 and the recesses 24 provided on the sipe wall surfaces 1804 of the other sipes 18 .
- the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of the protrusions 22 or the proportion occupied by the cross-sectional area of the recesses 24 , with respect to an area of the sipe wall surfaces 1804 is configured so as to be greater for the sipes 18 located at the edges in the tire circumferential direction than for the other sipes 18 .
- collapsing of the portions 16 A of the blocks 16 located at the edges in the tire circumferential direction is suppressed, a configuration in which the portions of the blocks 16 collapse uniformly in the tire circumferential direction can be obtained, and edge effect can be enhanced, which is advantageous for enhancing braking performance on ice. Additionally, sipe peeling is reduced, which is beneficial for suppressing uneven wear.
- Radial studless tires having a tire size of 215/60R16 provided with protrusions 22 and recesses 24 that engage with these protrusions 22 having the configurations shown in FIGS. 1A and 6 were assembled on rims having a rim size of 16 ⁇ 7J.
- the tires were inflated to an inner pressure of 200 kPa and mounted on the four wheels of an RV vehicle having an engine displacement of 2,000 cc.
- Tests for a Conventional Example and Working Examples 1, 2, 3, and 4 were conducted for dry braking, wet braking, and braking on ice.
- the width W of the sipes 18 was 0.4 mm
- the depth D was 6 mm
- the length L was 10 mm.
- Dry braking was measured as a braking distance from a point of brake application to stop when traveling on a dry asphalt road surface at a speed of 100 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Wet braking was measured as a braking distance from a point of brake application to stop when traveling on a wet asphalt road surface at a speed of 60 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Braking on ice was measured as a braking distance from a point of brake application to stop when traveling on ice at a speed of 40 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
Abstract
Description
- Priority is claimed to Japan Patent Application Serial No. 2010-165679 filed on Jul. 23, 2010.
- 1. Technical Field
- The present technology relates to a pneumatic tire and particularly relates to a pneumatic tire having enhanced tire braking performance on ice.
- 2. Related Art
- Tread patterns in which a plurality of sipes is disposed in a tire pattern in order to enhance braking performance on ice of studless tires are known. Also, in recent years, there has been a tendency toward increasing the number of sipes. However, sipe density is increased as a result of increasing the number of sipes, and while this leads to an increase in the number of edges, it also leads to the problems of the overall rigidity of the block declining and braking performance on ice declining.
- Therefore, technology has been proposed in which collapsing of portions of a block that are sandwiched by sipes is suppressed and a decline of block rigidity is suppressed by disposing recesses and protrusions within the sipes (Japanese Patent No. 3180160).
- However, in cases where a plurality of blocks are provided in a tread portion by a plurality of vertical grooves extending in the tire circumferential direction and a lateral groove extending in a direction that intersects the tire circumferential direction, and a plurality of sipes spaced in the tire circumferential direction are provided in a tread surface of the blocks, at an area located at edges of the blocks in the tire circumferential direction, a portion of the blocks is partitioned by the sipes and the lateral groove, and at areas other than the edges in the tire circumferential direction, a portion of the blocks is partitioned by adjacent sipes.
- Therefore, the portion of the blocks located at the edges in the tire circumferential direction is partitioned by the sipes and a lateral groove having a width greater than that of the sipes, and, compared to portions of blocks located at other areas that are sandwiched by adjacent sipes, these portions only engage with a portion of an adjacent block on one side and, thus, are prone to collapsing.
- When there are portions in blocks partitioned by vertical grooves and lateral grooves that are more prone to collapsing than other areas or, rather, when there are portions of the block that collapse more than other areas, it is difficult to enhance the edge effect and enhance braking performance on ice.
- The present technology was devised in light of the problems described above and provides a pneumatic tire that is useful in suppressing collapsing of portions of blocks positioned at edges in the tire circumferential direction and enhancing braking performance on ice.
- The present technology is a pneumatic tire including, in a tread portion, a plurality of blocks partitioned by a plurality of vertical grooves extending in a tire circumferential direction and a lateral groove extending in a direction that intersects with the tire circumferential direction. The pneumatic tire also includes, in a tread surface of the blocks, a plurality of sipes spaced in the tire circumferential direction extending in the direction that intersects with the tire circumferential direction. Portions of the blocks partitioned by the lateral groove and the sipes are formed at areas of the blocks located at edges in the tire circumferential direction, and portions of the blocks partitioned by sipes adjacent in the tire circumferential direction are formed in other areas of the blocks. In the sipes, protrusions are formed on a first sipe wall surface of mutually opposing sipe wall surfaces, and recesses that can engage with the protrusions are formed in a second sipe wall surface. The protrusions and the recesses are formed so as to generate a force by engaging that works to suppress bending deformation in the tire circumferential direction of the portions of the blocks. The protrusions and the recesses are formed so that the engaging between the portions of the blocks located at the edges in the tire circumferential direction and the portions of the blocks positioned adjacent to said portions of the blocks generates a force that works to suppress the bending deformation that is greater than the force generated by engaging between the other portions of the blocks.
- The portions of the blocks located at the edges in the tire circumferential direction are partitioned by sipes and a lateral groove having a width greater than that of the sipes, and the protrusions and the recesses engage only on one side. Therefore, these portions are more prone to collapsing than the portions of the blocks located at other areas that are partitioned by adjacent sipes.
- In the present technology, the engaging at the portions of the blocks located at the edges in the tire circumferential direction and the portions of the blocks positioned adjacent to said portions of the blocks generates a force that works to suppress bending deformation and that is configured so as to be greater than a force generated by engaging at the other portions of the blocks. Thereby, firm engaging is obtained and the collapsing of the portions of the blocks located at the edges in the tire circumferential direction is suppressed.
-
FIG. 1A is a plan view of a block.FIG. 1B is a cross-sectional view of a portion of the block that is cut at a portion of the sipes and is also an explanatory view of the protrusions. -
FIGS. 2A and 2B are explanatory views of the sipes, the protrusions, and the recesses; and are also perspective views of cross-sections of the portions of the block. -
FIG. 3 is a table showing test results for dry braking, wet braking, and braking on ice. -
FIG. 4 is an explanatory view of the sipes, the protrusions, and the recesses; and is also a perspective view of a cross-section of the portions of the block. -
FIGS. 5A to 5C are explanatory diagrams of a proportion of a sipe wall surface occupied by a cross-sectional area of the protrusions, a proportion of the sipe wall surface occupied by a cross-sectional area of the protrusions and the recesses, or a proportion of the sipe wall surface occupied by a cross-sectional area of the recesses, with respect to an area of the sipe wall surface.FIG. 5A is a perspective view of a cross section of a portion of the block.FIG. 5B is a plan view of a sipe.FIG. 5C is a drawing illustrating the cross-sectional area of the protrusions and the recesses occupied on the sipe wall surface in a state where the sipe wall surface and the sipe are laid open. -
FIG. 6 is a table showing test results for dry braking, wet braking, and braking on ice. - As illustrated in
FIGS. 1A , 1B, 2A and 2B, a plurality ofblocks 16 is provided in atread portion 10 by a plurality ofvertical grooves 12 extending in a tire circumferential direction andlateral grooves 14 extending in a direction that intersects the tire circumferential direction. - A plurality of
sipes 18 spaced in the tire circumferential direction are provided in atread surface 10A of theblocks 16, extending in the direction that intersects with the tire circumferential direction. -
Portions 16A of theblocks 16 are partitioned (sandwiched) by thesipes 18 and alateral groove 14 having a width that is greater than that of thesipes 18 at areas of theblocks 16 located at edges in the tire circumferential direction. - Additionally,
portions 16B of theblocks 16 are partitioned (sandwiched) byadjacent sipes 18 at areas of theblocks 16 other than at the edges in the tire circumferential direction. - In order to exert edge effect effectively, a width W of the
sipes 18 is preferably 0.3 mm or greater but 1.5 mm or less. - As illustrated in
FIG. 1A , a shape in a longitudinal direction of thesipes 18 may be configured as desired and, for example, may extend in a zigzag shape. - As illustrated in
FIG. 2A , a depth of thesipes 18 may extend linearly in a direction perpendicular to thetread surface 10, or alternately, as illustrated inFIG. 2B , may extend in a bent manner from thetread surface 10. - In this embodiment, the
sipes 18 have a uniform depth in the longitudinal direction thereof, with the exception of both ends. Both ends are configured so as to have a bottom-raisingportion 1802 where a bottom surface is gradually raised. - In the
sipes 18,protrusions 22 are formed on a first sipe wall surface of mutually opposingsipe wall surfaces 1804 and recesses 24 that engage with theprotrusions 22 are formed on a second sipe wall surface. Collapsing of the portions of theblocks 16 sandwiched by thesipes 18 is suppressed due to the engaging of theprotrusions 22 and therecesses 24. Specifically, due to the engaging of theprotrusions 22 and the recesses 24 a configuration is obtained in which a force is generated that works to suppress bending deformation in the tire circumferential direction of the portions of theblocks 16. - More specifically, a plurality of the
protrusions 22 and therecesses 24 are provided spaced in the longitudinal direction of thesipes 18 and a depth direction of thesipes 18. - The
protrusions 22 have a height in a direction perpendicular to thesipe wall surfaces 1804. - As illustrated in
FIGS. 2A and 2B , portions of theprotrusions 22 protruding from the sipe wall surfaces 1804 may be provided with a cylindrical shape and ends thereof may be provided with a hemispherical shape. Alternately, an entirety of theprotrusions 22 may be provided with a hemispherical shape. In short, it is sufficient that theprotrusions 22 and therecesses 24 be provided with shapes that mutually engage when theportions 16A of theblock 16 collapse so as to suppress the collapsing of theportions 16A of theblock 16. - In the
blocks 16, theprotrusions 22 and therecesses 24 are configured so as to suppress collapsing in the tire circumferential direction of theportions 16A of theblocks 16 located at the edges in the tire circumferential direction more than theother portions 16B of theblocks 16. In other words, theprotrusions 22 and therecesses 24 are formed so that the engaging between theportions 16A of theblocks 16 located at the edges in the tire circumferential direction and theportions 16B of theblocks 16 positioned adjacent to saidportions 16A of theblocks 16 generates a force that works to suppress the bending deformation that is greater than the force generated by engaging between theother portions 16B of theblocks 16. - Specifically, in the first embodiment, as illustrated in
FIGS. 2A and 2B , a height H1 of theprotrusions 22 provided on the sipe wall surfaces 1804 of thesipes 18 located at the edges in the tire circumferential direction is greater than a height H2 of theprotrusions 22 provided on the sipe wall surfaces 1804 of theother sipes 18. - In this case, the height H1 of the
protrusions 22 provided on the sipe wall surfaces 1804 of thesipes 18 located at the edges in the tire circumferential direction is preferably not less than 1.2 times and not more than 3.0 times greater than the height H2 of theprotrusions 22 provided on the sipe wall surfaces 1804 of theother sipes 18. More specifically, the height H2 of theprotrusions 22 provided on the sipe wall surfaces 1804 of theother sipes 18 is preferably from about 0.5 to 3.0 mm. - By providing the
protrusions 22 and recesses 24 on the sipe wall surfaces 1804 as described above, theprotrusions 22 and therecesses 24 engage and collapsing of theportions 16A of theblock 16 is suppressed. Thereby, a decline in contact area is suppressed and deformation of theblock 16 is suppressed, which are advantageous for enhancing braking performance on ice. - More specifically, the
portions 16A of theblocks 16 located at the edges in the tire circumferential direction are partitioned by thesipes 18 and alateral groove 14 having a width greater than that of thesipes 18 and engaging between theprotrusions 22 and therecesses 24 only occurs on one side of theportions 16A of theblocks 16. Therefore, theseportions 16A are more prone to collapsing than theportions 16B of theblocks 16 located at other areas partitioned byadjacent sipes 18. - However, in the first embodiment, the height H1 of the
protrusions 22 provided on the sipe wall surfaces 1804 of thesipes 18 located at the edges in the tire circumferential direction is greater than the height H2 of theprotrusions 22 provided on the sipe wall surfaces 1804 of theother sipes 18. - In other words, when the
portions blocks 16 are subjected to a force from a road surface, bending deformation and collapsing begins to occur. At this time, theprotrusions 22 and therecesses 24 engage, the force that is at work at the engaged portions acts to resist bending deformation, and bending deformation is suppressed. In other words, due to theprotrusions 22 and therecesses 24 engaging, a force is generated that works to suppress bending deformation in the tire circumferential direction of theportions blocks 16, and bending deformation is suppressed. - The
protrusions 22 and therecesses 24 engage more firmly when the height H1 of theprotrusions 22 is great and, therefore, the force that works to suppress the bending deformation is great. While theprotrusions 22 and therecesses 24 only engage on one side, collapsing of theportions 16A of theblocks 16 located at the edges in the tire circumferential direction is suppressed. - Thus, according to this embodiment, collapsing of the
portions 16A of theblocks 16 located at the edges in the tire circumferential direction is suppressed, a configuration in which the portions of the blocks collapse uniformly in the tire circumferential direction can be obtained, and edge effect can be enhanced, which is advantageous for enhancing braking performance on ice. Additionally, sipe peeling is reduced, which is advantageous for suppressing uneven wear. - Radial studless tires having a tire size of 215/60R16 provided with
protrusions 22 and recesses 24 that engage with theseprotrusions 22 having the configurations shown inFIGS. 1A and 3 were assembled on rims having a rim size of 16×7J. The tires were inflated to an inner pressure of 200 kPa and mounted on the four wheels of an RV vehicle having an engine displacement of 2,000 cc. Tests for a Conventional Example and Working Examples 1, 2, 3, and 4 were conducted for dry braking, wet braking, and braking on ice. - Note that the width W of the
sipes 18 was 0.4 mm, the depth D was 6 mm, and the length L was 10 mm. - Dry braking was measured as a braking distance from a point of brake application to stop when traveling on a dry asphalt road surface at a speed of 100 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Wet braking was measured as a braking distance from a point of brake application to stop when traveling on a wet asphalt road surface at a speed of 60 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Braking on ice was measured as a braking distance from a point of brake application to stop when traveling on ice at a speed of 40 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- From Working Examples 1, 2, 3, and 4 shown in
FIG. 3 , it is clear that dry braking, wet braking, and braking on ice can be enhanced when the height of theprotrusions 22 of thesipes 18 located at the edges in the tire circumferential direction is configured so as to be greater than the height of theprotrusions 22 of theother sipes 18. - Additionally, from Working Example 3, it is clear that configuring the height of the
protrusions 22 of thesipes 18 located at the edges in the tire circumferential direction to be two-times greater than the height of theprotrusions 22 of theother sipes 18 is advantageous for enhancing dry braking, wet braking, and braking on ice. - In a second embodiment as well, a plurality of
sipes 18 extending in a direction that intersects with the tire circumferential direction and spaced in the tire circumferential direction are provided in atread surface 10A ofblocks 16 partitioned by a plurality ofvertical grooves 12 andlateral grooves 14, andprotrusions 22 and recesses 24 that mutually engage and suppress the collapsing of the portions of theblocks 16 are provided on mutually opposing sipe wall surfaces 1804 in thesipes 18, the same as in the first embodiment. - Additionally,
portions 16A of theblocks 16 located at edges in the tire circumferential direction are partitioned by thesipes 18 and alateral groove 14 having a width greater than that of thesipes 18. Therefore, theseportions 16A are more prone to collapsing thanportions 16B of theblocks 16 located at other areas partitioned byadjacent sipes 18, the same as in the first embodiment. - In the second embodiment, as illustrated in
FIGS. 4 and 5A to 5C, a proportion of the sipe wall surfaces 1804 occupied by a cross-sectional area of theprotrusions 22, a proportion occupied by a cross-sectional area of theprotrusions 22 and therecesses 24, or a proportion occupied by a cross-sectional area of therecesses 24, with respect to an area of the sipe wall surfaces 1804, for the sipe wall surfaces 1804 of thesipes 18 located at the edges in the tire circumferential direction is configured so as to be greater than for the sipe wall surfaces 1804 of theother sipes 18. In other words, theprotrusions 22 and therecesses 24 are formed so that the engaging between theportions 16A of theblocks 16 located at the edges in the tire circumferential direction and theportions 16B of theblocks 16 positioned adjacent to saidportions 16A of theblocks 16 generates a force that works to suppress the bending deformation that is greater than the force generated by engaging between theother portions 16B of theblocks 16. - Here, the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of the
protrusions 22, the proportion occupied by the cross-sectional area theprotrusions 22 and therecesses 24, or the proportion occupied by the cross-sectional area of therecesses 24, with respect to an area of the sipe wall surfaces 1804, is not less than 1.2 times and not more than 3.0 times greater for the sipe wall surfaces 1804 of thesipes 18 located at the edges in the tire circumferential direction than for the sipe wall surfaces 1804 of theother sipes 18. - More specifically, as illustrated in
FIG. 5A , when theprotrusions 22 are formed on afirst side wall 1804 of a pair of opposingside walls sipes 18 and therecesses 24 are formed in asecond side wall 1804, from the perspective of thefirst side wall 1804, the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of theprotrusions 22, with respect to the area of the sipe wall surfaces 1804, is greater for thesipes 18 located at the edges in the tire circumferential direction than for theother sipes 18. From the perspective of thesecond side wall 1804, the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of therecesses 24, with respect to the area of the sipe wall surfaces 1804, is greater for thesipes 18 located at the edges in the tire circumferential direction than for theother sipes 18. - Additionally, as illustrated in
FIGS. 5B and 5C , when theprotrusions 22 and therecesses 24 are both formed in thefirst side wall 1804, and theprotrusions 22 and therecesses 24 are both formed in thesecond side wall 1804 of the pair of opposingside walls sipes 18, from the perspective of theside walls 1804, the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of theprotrusions 22 and therecesses 24 with respect to the area of the sipe wall surfaces 1804 is formed greater for the sipes located at the edges in the tire circumferential direction than for theother sipes 18. Note that the height of theprotrusions 22 is preferably from about 0.5 to 3.0 mm, the same as in the first embodiment. - Examples of methods that can be considered for varying the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of protrusions and recesses (the
protrusions 22 and the recesses 24) between thesipes 18 at the edges in the tire circumferential direction and theother sipes 18 include aspects of adjusting the number of the protrusions and recesses provided in thesipes 18 and varying the cross-sectional area of the protrusions and recesses. - In this embodiment, the number of protrusions and recesses provided in the sipes is adjusted. Specifically, as illustrated in
FIG. 4 , in thesipes 18 located at the edges in the tire circumferential direction, three of theprotrusions 22 are provided spaced in the depth direction on the firstsipe wall surface 1804 of the opposing sipe wall surfaces 1804 and 1804 in thesipes 18, and three of therecesses 24 that engage with theprotrusions 22 are provided spaced in the depth direction on the secondsipe wall surface 1804. Additionally, in theother sipes 18, two of theprotrusions 22 are provided spaced in the depth direction on the firstsipe wall surface 1804 of the opposing sipe wall surfaces 1804 and 1804 in thesipes 18, and two of therecesses 24 that engage with theprotrusions 22 are provided spaced in the depth direction on the secondsipe wall surface 1804. - In the second embodiment, the
protrusions 22 and therecesses 24 engage and collapsing of theportions 16A of theblock 16 is suppressed. Thereby, a decline in contact area is suppressed and deformation of theblock 16 is suppressed, which are advantageous for enhancing braking performance on ice. - More specifically, the
portions 16A of theblocks 16 located at the edges in the tire circumferential direction are partitioned by thesipes 18 and alateral groove 14 having a width greater than that of thesipes 18. Therefore, theseportions 16A are more prone to collapsing than theportions 16B of theblocks 16 located at other areas partitioned byadjacent sipes 18. - However, in this embodiment, a number of the
protrusions 22 and therecesses 24 provided on the sipe wall surfaces 1804 of thesipes 18 located at the edges in the tire circumferential direction is greater than that of theprotrusions 22 and therecesses 24 provided on the sipe wall surfaces 1804 of theother sipes 18. In other words, the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of theprotrusions 22 or the proportion occupied by the cross-sectional area of therecesses 24, with respect to an area of the sipe wall surfaces 1804, is configured so as to be greater for thesipes 18 located at the edges in the tire circumferential direction than for theother sipes 18. - In other words, when the
portions blocks 16 are subjected to a force from a road surface, bending deformation and collapsing begins to occur. At this time, theprotrusions 22 and therecesses 24 engage, the force that is at work at the engaged portions acts to resist bending deformation, and bending deformation is suppressed. When the proportion of the sipe wall surfaces 1804 occupied by the cross-sectional area of theprotrusions 22 or the proportion occupied by the cross-sectional area of therecesses 24 with respect to the area of the sipe wall surfaces 1804 is great, theprotrusions 22 and therecesses 24 engage more firmly. Therefore, while theprotrusions 22 and therecesses 24 only engage on one side of theportions 16A of theblocks 16, the force that works to suppress the bending deformation is great and collapsing of theportions 16A of theblocks 16 located at the edges in the tire circumferential direction is suppressed. - Thus, according to this embodiment, collapsing of the
portions 16A of theblocks 16 located at the edges in the tire circumferential direction is suppressed, a configuration in which the portions of theblocks 16 collapse uniformly in the tire circumferential direction can be obtained, and edge effect can be enhanced, which is advantageous for enhancing braking performance on ice. Additionally, sipe peeling is reduced, which is beneficial for suppressing uneven wear. - Radial studless tires having a tire size of 215/60R16 provided with
protrusions 22 and recesses 24 that engage with theseprotrusions 22 having the configurations shown inFIGS. 1A and 6 were assembled on rims having a rim size of 16×7J. The tires were inflated to an inner pressure of 200 kPa and mounted on the four wheels of an RV vehicle having an engine displacement of 2,000 cc. Tests for a Conventional Example and Working Examples 1, 2, 3, and 4 were conducted for dry braking, wet braking, and braking on ice. - Note that the width W of the
sipes 18 was 0.4 mm, the depth D was 6 mm, and the length L was 10 mm. - Dry braking was measured as a braking distance from a point of brake application to stop when traveling on a dry asphalt road surface at a speed of 100 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Wet braking was measured as a braking distance from a point of brake application to stop when traveling on a wet asphalt road surface at a speed of 60 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- Braking on ice was measured as a braking distance from a point of brake application to stop when traveling on ice at a speed of 40 km/h. Using the reciprocal of the braking distance, the results were expressed as index values with an index value of the Conventional Example being 100. Larger index values indicate superior braking performance.
- From the Working Examples 1, 2, 3, and 4 shown in
FIG. 6 it is clear that dry braking, wet braking, and braking on ice can be enhanced when a proportion of the sipe wall surfaces 1804 occupied by a cross-sectional area of theprotrusions 22, a proportion occupied by a cross-sectional area theprotrusions 22 and therecesses 24, or a proportion occupied by a cross-sectional area of therecesses 24, with respect to an area of the sipe wall surfaces 1804, for thesipes 18 located at the edges in the tire circumferential direction, is configured so as to be greater than for theother sipes 18. - Additionally, from Working Example 3, it is clear that configuring a proportion of the sipe wall surfaces 1804 occupied by a cross-sectional area of the
protrusions 22, a proportion occupied by a cross-sectional area theprotrusions 22 and therecesses 24, or a proportion occupied by a cross-sectional area of therecesses 24, with respect to an area of the sipe wall surfaces 1804, so as to be two-times greater for thesipes 18 located at the edges in the tire circumferential direction than for theother sipes 18 is advantageous for enhancing dry braking, wet braking, and braking on ice.
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-165679 | 2010-07-23 | ||
JP2010165679 | 2010-07-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20120018069A1 true US20120018069A1 (en) | 2012-01-26 |
US9180739B2 US9180739B2 (en) | 2015-11-10 |
Family
ID=44318431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/183,350 Active 2032-03-30 US9180739B2 (en) | 2010-07-23 | 2011-07-14 | Pneumatic tire |
Country Status (6)
Country | Link |
---|---|
US (1) | US9180739B2 (en) |
JP (1) | JP5454510B2 (en) |
CN (1) | CN102343772A (en) |
DE (1) | DE102011079281B4 (en) |
FI (1) | FI126144B (en) |
RU (1) | RU2472633C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019020232A1 (en) * | 2017-07-25 | 2019-01-31 | Continental Reifen Deutschland Gmbh | Tread profile of a vehicle tyre |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6051602B2 (en) * | 2012-06-05 | 2016-12-27 | 横浜ゴム株式会社 | Pneumatic tire |
JP6015249B2 (en) * | 2012-08-30 | 2016-10-26 | 横浜ゴム株式会社 | Pneumatic tire |
FR2997043B1 (en) * | 2012-10-24 | 2015-04-24 | Michelin & Cie | EVOLUTIVE ROLLER |
FR3014747B1 (en) * | 2013-12-13 | 2015-12-11 | Michelin & Cie | ADVANCED TIRE ROLLER FOR TIRES |
RU2589531C2 (en) * | 2014-11-28 | 2016-07-10 | Открытое акционерное общество "КОРДИАНТ" | Pneumatic tyre tread |
JP6563280B2 (en) * | 2015-09-08 | 2019-08-21 | Toyo Tire株式会社 | Pneumatic tire |
JP6759930B2 (en) * | 2016-09-26 | 2020-09-23 | 横浜ゴム株式会社 | Pneumatic tires |
DE102016224803A1 (en) * | 2016-12-13 | 2018-06-28 | Continental Reifen Deutschland Gmbh | Vehicle tires |
CN110239286A (en) * | 2019-05-09 | 2019-09-17 | 正新橡胶(中国)有限公司 | A kind of pneumatic tire |
KR102561798B1 (en) * | 2021-08-23 | 2023-08-01 | 한국타이어앤테크놀로지 주식회사 | Kerf blade for forming tire 3d kerf and 3d kerf structure of tire |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4934424A (en) * | 1987-02-20 | 1990-06-19 | Bridgestone Corporation | Pneumatic tire having blocks with plural transverse sipes at different depths |
JPH1080923A (en) * | 1996-09-09 | 1998-03-31 | Bridgestone Corp | Pneumatic tire and vulcanizing mold for pneumatic tire |
JP2002103921A (en) * | 2000-09-27 | 2002-04-09 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
US20020139164A1 (en) * | 2001-03-27 | 2002-10-03 | Ngk Insulators, Ltd. | Press die for molding sipe blade and method of making the press die |
JP2006298055A (en) * | 2005-04-18 | 2006-11-02 | Bridgestone Corp | Pneumatic tire |
US20090165911A1 (en) * | 2007-12-28 | 2009-07-02 | Toyo Tire & Rubber Co., Ltd | Pneumatic tire |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03110783A (en) | 1989-09-22 | 1991-05-10 | Aikomu Internatl:Kk | Manufacture of plate type heating body |
JPH03180160A (en) | 1989-12-07 | 1991-08-06 | Kawabe Kk | Ball roller-type heating apparatus for spherical cake |
JP3110783B2 (en) | 1991-04-02 | 2000-11-20 | 株式会社ブリヂストン | Pneumatic radial tire |
JP3180160B2 (en) * | 1991-08-27 | 2001-06-25 | 横浜ゴム株式会社 | studless tire |
JPH08175115A (en) * | 1994-12-22 | 1996-07-09 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
DE69810970T2 (en) | 1998-03-25 | 2003-08-28 | Goodyear Tire & Rubber | TIRE TREAD WITH 3-D SLATS |
DE60116190T2 (en) | 2000-07-03 | 2006-08-17 | Société de Technologie Michelin | Pneumatic tire with a tread for heavy loads |
JP4711373B2 (en) | 2001-04-24 | 2011-06-29 | 東洋ゴム工業株式会社 | Pneumatic tire |
JP4307866B2 (en) | 2003-02-28 | 2009-08-05 | 東洋ゴム工業株式会社 | Pneumatic tire, pneumatic tire molding die and pneumatic tire molding method |
JP2004314758A (en) * | 2003-04-15 | 2004-11-11 | Bridgestone Corp | Pneumatic tire |
JP2005041339A (en) | 2003-07-22 | 2005-02-17 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
JP4377649B2 (en) * | 2003-10-15 | 2009-12-02 | 住友ゴム工業株式会社 | Pneumatic tire |
US7143799B2 (en) | 2003-11-20 | 2006-12-05 | The Goodyear Tire & Rubber Company | Three-dimensional sipes for treads |
JP3898692B2 (en) | 2003-12-03 | 2007-03-28 | 住友ゴム工業株式会社 | Pneumatic tire |
DE602005020634D1 (en) | 2004-08-06 | 2010-05-27 | Bridgestone Corp | COMPRESSED AIR TIRES AND METHOD FOR THE PRODUCTION THEREOF |
JP2006188185A (en) * | 2005-01-07 | 2006-07-20 | Bridgestone Corp | Pneumatic tire |
SK1022006A3 (en) | 2006-07-18 | 2008-03-05 | Continental Matador Rubber, S. R. O. | Tire protector and lamella convenient for fixing into vulcanization shape for creating lamellar canal in block of tire protector |
JP4316603B2 (en) * | 2006-11-27 | 2009-08-19 | 東洋ゴム工業株式会社 | Pneumatic tire |
JP4315985B2 (en) * | 2007-02-07 | 2009-08-19 | 東洋ゴム工業株式会社 | Pneumatic tire |
JP4740301B2 (en) * | 2008-09-12 | 2011-08-03 | 東洋ゴム工業株式会社 | Pneumatic tire |
-
2011
- 2011-05-10 JP JP2011105032A patent/JP5454510B2/en active Active
- 2011-07-14 US US13/183,350 patent/US9180739B2/en active Active
- 2011-07-15 DE DE102011079281.3A patent/DE102011079281B4/en active Active
- 2011-07-21 FI FI20115766A patent/FI126144B/en active IP Right Grant
- 2011-07-22 RU RU2011130832/11A patent/RU2472633C1/en active
- 2011-07-25 CN CN2011102086291A patent/CN102343772A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4934424A (en) * | 1987-02-20 | 1990-06-19 | Bridgestone Corporation | Pneumatic tire having blocks with plural transverse sipes at different depths |
JPH1080923A (en) * | 1996-09-09 | 1998-03-31 | Bridgestone Corp | Pneumatic tire and vulcanizing mold for pneumatic tire |
JP2002103921A (en) * | 2000-09-27 | 2002-04-09 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
US20020139164A1 (en) * | 2001-03-27 | 2002-10-03 | Ngk Insulators, Ltd. | Press die for molding sipe blade and method of making the press die |
JP2006298055A (en) * | 2005-04-18 | 2006-11-02 | Bridgestone Corp | Pneumatic tire |
US20090165911A1 (en) * | 2007-12-28 | 2009-07-02 | Toyo Tire & Rubber Co., Ltd | Pneumatic tire |
Non-Patent Citations (3)
Title |
---|
English machine translation of JP10-080923, dated 03-1998 * |
English machine translation of JP2002-103921, dated 04-2002 * |
English machine translation of JP2006-298055, dated 11-2006 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019020232A1 (en) * | 2017-07-25 | 2019-01-31 | Continental Reifen Deutschland Gmbh | Tread profile of a vehicle tyre |
Also Published As
Publication number | Publication date |
---|---|
CN102343772A (en) | 2012-02-08 |
FI20115766L (en) | 2012-01-24 |
DE102011079281B4 (en) | 2020-01-23 |
RU2472633C1 (en) | 2013-01-20 |
JP5454510B2 (en) | 2014-03-26 |
JP2012041035A (en) | 2012-03-01 |
FI126144B (en) | 2016-07-15 |
DE102011079281A1 (en) | 2012-04-05 |
FI20115766A0 (en) | 2011-07-21 |
US9180739B2 (en) | 2015-11-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9180739B2 (en) | Pneumatic tire | |
US8875760B2 (en) | Pneumatic tire | |
JP6010704B2 (en) | Pneumatic tire | |
JP4471033B1 (en) | Pneumatic tire | |
US9827812B2 (en) | Pneumatic tire | |
EP3115229B1 (en) | Heavy duty pneumatic tire | |
JP6139843B2 (en) | Pneumatic tire | |
JP2009280035A (en) | Pneumatic tire | |
JP6134583B2 (en) | tire | |
JP2008290521A (en) | Pneumatic tire | |
KR101668712B1 (en) | All season tire | |
JP5647462B2 (en) | tire | |
JP5479935B2 (en) | Pneumatic tire | |
JP5104046B2 (en) | Pneumatic tire | |
JP5437851B2 (en) | Pneumatic tire | |
JP5943814B2 (en) | Pneumatic tire | |
JP5363896B2 (en) | Pneumatic tire | |
JP7418206B2 (en) | pneumatic tires | |
JP5368786B2 (en) | Pneumatic tire | |
JP5443145B2 (en) | Pneumatic tire | |
JP5675454B2 (en) | Pneumatic tire | |
JP5675453B2 (en) | Pneumatic tire | |
JP5952580B2 (en) | Pneumatic tire | |
JP2011037383A (en) | Pneumatic tire | |
JP2011102083A (en) | Pneumatic tire |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: THE YOKOHAMA RUBBER CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NAGAYASU, MASAAKI;REEL/FRAME:026594/0245 Effective date: 20110616 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
AS | Assignment |
Owner name: THE YOKOHAMA RUBBER CO., LTD., JAPAN Free format text: CHANGE OF ADDRESS FOR ASSIGNEE;ASSIGNOR:THE YOKOHAMA RUBBER CO., LTD.;REEL/FRAME:065626/0740 Effective date: 20231025 |